Boring or drilling machine



Patented May 9, H5199.

L. PERSON.

BORING 0R DRILLING MACHINE.

A lication filed Oct. 7,4898.)

(No Model.)

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c n W 1 n m H w w o H w M r O H P s a m P a a a o N a H r NITED' STATES PATENT OFFICE.

LOT PERSON, 0F OARTWRIGHT, PENNSYLVANIA.

BORING OR DRILLING MACHINE.

SPECIFICATION-forming part of Letters Patent No. 624,858, dated May 9, 1899.

Application filed October 7, 1 8 9 8.

To a. whom it may concern;

Be it known that I, LOT PERSON, of Cartwright, in the county of Elk-and State of Pennsylvania, have invented a new and Improved Boring or Drilling Machine, of which the following is a full, clear, and exact description.

My invention relates to an improvement in .boring or drilling machines which give to the boring-tool'a rotary movement, and is designed particularly for use in boring rocks, coal, or similar minerals.

My invention comprises the novel features hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is an elevation of my device. Fig. 2 is an end view thereof. Fig. 3is an elevation similar to Fig. 1 with parts in section. Fig. 4 is a separateview of the drill-holder. Fig. 5 is a perspective view of the central sleeve through which the drill-holder passes and by which it is turned. Figs. 6 and 7 are respectively a plan view and a side elevation of the clamping-nut with the parts opened. Figs. 8 and 9 are respectively a plan view and a side elevation of the lower half of the frame. Fig. 1-0 is a detail view of the pin by which the two halves of the clampingmut are secured together, and Fig. 11 is a detail view of the spur upon the end of the supporting post of the machine.

The object of my invention is to providea drill which will be light and effective in operation,cheap in manufacture, and which may be used under conditions and in places where the ordinary drill is not eifective. WVith this object in view the mechanism has been devised so as to place the drill-holder at one edge of the device, so that it may be used close to the roof of a tunnel, and thus enable a hole to be drilled substantially parallel to the roof and very close thereto.

The main frame of the device consists of the two parts A and A, which support the operating mechanism, the two parts being joined together by a bolt 0., which passes through both parts and also through a spacing-block A A second bolt is also used to hold said parts A A together and may pass Serial no. 6 92|895. (No model.)

through both parts or be made as a stud-bolt a, such as shown in Fig. 9, said bolt in such case passing through one of the bosses a on one of the parts and entering the other part, as shown in Fig. 3. The bolts are not only serve to hold the two halves of the frame together, but also render it possible to conveniently insert the gears by which power is communicated to the drill-holder.. A shaft 1) is journaled in the frame and carries an operating-crank 0,, and upon the same shaft is mounted a fly-wheel O, which may also be provided with an operating-crank. Upon the shaft 12 is also mounted a bevel-gear B, which meshes with a second bevel-gear B, mounted upon a shaft b, which is journaled in the frame at right angles to the shaft 19. Upon the opposite end of the frame is mounted the drill-holder E, and this drill holder and the shaft 1) are connected by a series of gears, which, as herein shown, consist of a gear B which is secured to the shaft 1), a gear B, which surrounds the tool-holder and is connected thereto, so as to rotate it, and an idlergear B which connects the other two gears. The gear B is secured to the body of the sleeve F, which is shown inperspective view in Fig. 5. This sleeve is mountedin the frame A by means of a peripheral groove f, which is engaged bya band E secured by set-screws e tothe part A of the frame, so as to hold the sleeve in place.

Thetool-holder E is flattened at one end and provided with a socket E, shaped so as to receive the tool. The body of the toolholder is also exteriorly threaded and is provided with one or more keyways e,- extending longitudinally thereof and adapted to receive corresponding pins or lugs f, projecting inwardly from the sleeve F. By this means the tool-holder is positively turned by the sleeve and yetis free to slide longitudinally therein. Upon the corresponding end of the other frame A is formed a boss A to which is attached one end of a hollow post D. This atdesirable in putting the drill in operation. Between the same ends of the two parts A and m ends may be clamped together.

A of the frame is inserted a nut G, which is separately shown in Figs. 6 and 7, and consists of two semicircular bars hinged at g and provided with means by which the opposite The clamping means herein shown consists of a bolt H, (shown separately in Fig. 10,) which passes through the hole h in onehalf of the nut and is threaded into the hole h in the other half. The hole It is of sufficient size to allow the bolt to pass freely through the same. The nutis placed in position between the two ends of the frame and clamped upon the tool-holder E, thus engaging the threaded surfaces of each and preventing any longitudinal movement of the tool-holder except that due to its rotation in the nut.

The two halves of the bolt are also provided with two semicircular recesses g, which are adapted to register when the nut is clamped in position, and thus to form a hole which receives a pin a, projecting from the surface of the part A, thus preventing rotation of the nut.

It will be evident that when the crank C and fly-wheel (J are rotated the gear connections between them and the tool-holder E will cause the latter to be rotated and at the same time to be given a longitudinal movement due to the action of the threads upon the toolholderand the nut G. These threads are made of a fine pitch, so that the tool-holder will not be advanced too rapidly. The pitch of the thread will depend upon the kind of work for which the drill is to be used. The hollow post D receives the bulk of the tool-holder when the device is first put into operation. In order to prevent the threads upon the inner portion of thetool-holderfrom rubbingagainst theinnersurface of the post D, the tool-holder is provided at its inner end with a disk or washer e,which is of slightly-larger diameter than the tool-holder and of such size that it will smoothly engage the inner surface of the post. This washer thus acts as a guide to keep the tool-holder in the center of the post and prevent its threads from rubbing against the post.

In using this drill a short tool is first placed in the tool-holder. A suitable backing for engagement of the rear end of the post is secured and the device placed in position. When the drill-hole has been made of such a depth as to fully extend the drill-holder, the nut G is unclamped and the drill-holder and drill withdrawn and a longerdrillsubstituted.

In this way drills of slightly-greater length are in turn brought into use, and the whole may thus be advanced to considerable depth, the advance being by short distances not exceeding the length of the threaded portion of the drill-holder. The withdrawing of the drill-holder may be quickly done, as the releasing of the nut is but a moments work.

It will be noticed that the drill lies clear at one side of the device, so that it may be used to drill a hole which is very close to the roof of a tunnel. It is thus unnecessary to incline the drill-holder, and thus to remove a large amount of material, which need not be dis turbed if it were possible to make the drillhole parallel with the finished line of tunnel. The inability to so make the drill-hole often renders it necessary to needlessly remove a large amount of material in order to secure the required minimum opening.

Having thus fully described myinvention, I claim as new and desire to secure by Letters Patent l. A boring-machine or drill, comprising a frame havingagear drivingmechanism thereon, one of the gears having a central hole and a key therein, an externally-threaded drillholder passing through the hole in said gear and having a keyway engaging said key, a two-part nut adapted to embrace the drillholder and having a socket formed in the meeting surfaces of the two halves, the frame having members engaging opposite ends of thenut and a pin on the frame entering the socket in the nut, substantially as described.

2. A boring-machine or drill, comprising a frame having crank and gear driving mechanisms thereon, one of the gears having a central hole and an inwardly-projecting key, an externally-threaded drill-holder passing through the hole in said gear and having a keyway engaged by said key, a two-part nut removable from the frame and adapted to embrace the drill-holder, said nut engaging the frame at one end and being supported from the frame against movement in the opposite direction, the frame and nut having engaging members preventing rotation, and a hollow post secured to the frame and receiving the drill-holder, substantially as described.

LOT PERSON.

Witnesses:

ROBERT DAWSON HALL, JOHN TIPPERMAN.

ICS V 

